/*
 * Copyright (C) 2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.edu.tjnu.simplequery.global;

import org.springframework.http.ResponseEntity;
import org.springframework.validation.BindException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.validation.ConstraintViolationException;

/**
 * 全局异常处理器。
 *
 * @author 王帅
 * @since 1.0
 */
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 通过某种方法绕过了前端的校验，处理校验失败异常。返回 HTTP 400 状态码，表示一个
     * 非法请求。
     */
    @ExceptionHandler({
            BindException.class,
            ConstraintViolationException.class,
            MethodArgumentNotValidException.class
    })
    public ResponseEntity<String> validExceptionHandler() {
        return ResponseEntity.badRequest()
                .body("未经过前端校验的非法参数！");
    }

}
